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The NA60 experiment at the CERN SPS studied phi meson production in In-Incollisions at 158 A GeV via muon and kaon decay channels. Results in thehadronic channel are presented for the first time. These are discussed in theframework of the so-called phi puzzle through the comparison with the previousNA60 measurements in the muon channel. The yield and inverse m_T slopesobserved in the two channels are compatible within errors, showing that thelarge discrepancies seen in Pb-Pb collisions between NA50 (muon pairs) and NA49(kaon pairs) are not seen in the NA60 In-In data.

NA60 results on phi production in the hadronic and leptonic channels in In-In collisions at 158 GeV